Backreaction on Moving Mirrors and Black Hole Radiation

We compute the effect of quantum mechanical backreaction on the spectrum of radiation in a dynamical moving mirror model, mimicking the effect of a gravitational collapse geometry. Our method is based on the use of a combined WKB and saddle-point approximation to implement energy conservation in the calculation of the Bogolyubov coefficients, in which we assume that the mirror particle has finite mass m. We compute the temperature of the produced radiation as a function of time and find that after a relatively short time, the temperature is reduced by a factor 1/2 relative to the standard result. We comment on the application of this method to two-dimensional dilaton gravity with a reflecting boundary, and conclude that the WKB approximation quickly breaks down due to the appearance of naked singularities and/or white hole space-times for the relevant WKB-trajectories.Comment: 12 pages, latex, 4 figure

Estimating rBDπr_{B}^{D\pi} as an input to the determination of the CKM angle γ\gamma

The interference between Cabibbo-favoured and Cabibbo-suppressed $B\to D\pi$ decay amplitudes provides sensitivity to the CKM angle $\gamma$. The relative size of the interfering amplitudes is an important ingredient in the determination of $\gamma$. Using branching fractions from various $B\to Dh$ decays, and the measured value for $r_{B}^{DK}$, the magnitude of the amplitude ratio of $B^+\to D^0\pi^+$ and $B^+\to \bar{D}^0\pi^+$ decays is estimated to be $r_{B}^{D\pi} = 0.0053 \pm 0.0007$.Comment: 4 pages, 4 figure

Tests of Factorization and SU(3) Relations in B Decays into Heavy-Light Final States

Using data from the B factories and the Tevatron, we perform tests of how well non-leptonic B decays of the kind B -> D^{(*)}_{(s)} P, where P is a pion or kaon, are described within the factorization framework. We find that factorization works well - as is theoretically expected - for color-allowed, tree-diagram-like topologies. Moreover, also exchange topologies, which have a non-factorizable character, do not show any anomalous behavior. We discuss also isospin triangles between the B -> D^{(*)} pi decay amplitudes, and determine the corresponding amplitudes in the complex plane, which show a significant enhancement of the color-suppressed tree contribution with respect to the factorization picture. Using data for B -> D^{(*)} K decays, we determine SU(3)-breaking effects and cannot resolve any non-factorizable SU(3)-breaking corrections larger than \sim 5%. In view of these results, we point out that a comparison between the \bar B^0_d -> D^+\pi^- and \bar B^0_s -> D_s^+\pi^- decays offers an interesting new determination of f_d/f_s. Using CDF data, we obtain the most precise value of this ratio at CDF, and discuss the prospects for a corresponding measurement at LHCb.Comment: 12 pages, 6 figures, matches published version in Physical Review

PENGARUH PENGGUNAAN FASILITAS BELAJAR DI SEKOLAH DAN CARA BELAJAR SISWA TERHADAP PRESTASI BELAJAR MATA PELAJARAN PERALATAN KANTOR PADA SISWA KELAS XI ADMINISTRASI PERKANTORAN SMK NEGERI 1 SUKOHARJO TAHUN PELAJARAN 2012/2013

ABSTRAK Tuning Wijayanti. Pengaruh Penggunaan Fasilitas Belajar di Sekolah dan Cara Belajar Siswa Terhadap Prestasi Belajar Mata Pelajaran Peralatan Kantor Pada Siswa Kelas XI Administrasi Perkantoran SMK Negeri 1 Sukoharjo Tahun Pelajaran 2012/2013. Skripsi, Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta, Juli 2013. Tujuan penelitian ini adalah untuk mengetahui: (1) ada tidaknya pengaruh yang signifikan penggunaan fasilitas belajar di sekolah terhadap prestasi belajar mata pelajaran peralatan kantor pada siswa kelas XI Administrasi Perkantoran SMK Negeri 1 Sukoharjo Tahun Pelajaran 2012/2013; (2) ada tidaknya pengaruh yang signifikan cara belajar siswa terhadap prestasi belajar mata pelajaran peralatan kantor pada siswa kelas XI Administrasi Perkantoran SMK Negeri 1 Sukoharjo Tahun Pelajaran 2012/2013; (3) ada tidaknya pengaruh yang signifikan penggunaan fasilitas belajar di sekolah dan cara belajar siswa terhadap prestasi belajar mata pelajaran peralatan kantor pada siswa kelas XI Administrasi Perkantoran SMK Negeri 1 Sukoharjo Tahun Pelajaran 2012/2013. Penelitian ini menggunakan metode deskriptif kuantitatif. Populasi dalam penelitian ini adalah seluruh siswa kelas XI Administasi Perkantoran SMK Negeri 1 Sukoharjo Tahun Pelajaran2012/2013 sebanyak 79 siswa dengan mengambil sampel 40 siswa. Teknik pengambilan sampel menggunakan sampling insidental. Teknik pengumpulan data menggunakan angket dan dokumentasi. Teknik analisis data yang digunakan adalah analisis regresi linear ganda. Hasil penelitian dapat disimpulkan bahwa: (1) ada pengaruh yang signifikan penggunaan fasilitas belajar di sekolah terhadap prestasi belajar mata pelajaran peralatan kantor pada siswa kelas XI administrasi perkantoran SMK Negeri 1 Sukoharjo Tahun Pelajaran 2012/213 (thitung = 3,611 > ttabel = 1,684 pada taraf signifikansi 5%). (2) ada pengaruh yang signifikan cara belajar siswa terhadap prestasi belajar mata pelajaran peralatan kantor pada siswa kelas XI administrasi perkantoran SMK Negeri 1 Sukoharjo tahun pelajaran 2012/2013 (thitung = 3,393 > ttabel = 1,684 pada taraf signifikansi 5%). (3) ada pengaruh yang signifikan penggunaan fasilitas belajar di sekolah dan cara belajar siswa secara bersama-sama terhadap prestasi belajar mata pelajaran peralatan kantor pada siswa kelas XI administrasi perkantoran SMK Negeri 1 Sukoharjo tahun pelajaran 2012/2013 (Fhitung = 11,186 > Ftabel = 3,252 pada taraf signifikansi 5%). Persamaan garis linear ganda Ŷ = 55,207 + 0,243 X1 + 0,161 X2. besarnya kontribusi variabel bebas secara bersama-sama terhadap variabel terikat (R2) sebesar 37,7%. Sumbangan relatif penggunaan fasilitas belajar terhadap prestasi belajar sebesar 53,34% dan sumbangan relatif cara belajar siswa terhadap prestasi belajar sebesar 46,66%. Sumbangan efektif penggunaan fasilitas belajar terhadap prestasi belajar sebesar 20,10% dan sumbangan efektif cara belajar siswa terhadap prestasi belajar sebesar 17,58%. Kata kunci: fasilitas belajar, cara belajar, prestasi belajar ABSTRACT Tuning Wijayanti. The Effect of the Learning Facility Use at School and the Way of Learning on the Learning Achievement in Office Equipment Subject Matter of the Students in Grade XI of the Office Administration Program of State Vocational High School 1 of Sukoharjo in Academic Year 2012/2013. Skripsi: The Faculty of Teacher Training and Education, Sebelas Maret University, Surakarta, July 2013. The objectives of this research are to investigate: (1) whether or not there is a significant effect of the learning facility use at school on the learning achievement in Office Equipment subject matter of the students in Grade XI of the Office Administration Program of State Vocational High School 1 of Sukoharjo in Academic Year 2012/2013; (2) whether or not there is a significant effect of the way of learning on the learning achievement in Office Equipment subject matter of the students in Grade XI of the Office Administration Program of State Vocational High School 1 of Sukoharjo in Academic Year 2012/2013; and (3) whether or not there is a simultaneously significant effect of the learning facility use at school and the way of learning on the learning achievement in Office Equipment subject matter of the students in Grade XI of the Office Administration Program of State Vocational High School 1 of Sukoharjo in Academic Year 2012/2013. This research used the descriptive quantitative method. The population of the research was all of the students in Grade XI of the Office Administration Program of State Vocational High School 1 of Sukoharjo in Academic Year 2012/2013 as many as 79 students. The samples of the research were 40 students and were taken by using the sampling incidental technique. The data of the research were gathered through questionnaire and documentation. They were then analyzed by using the multiple linear regression analysis. The results of the research are as follows: (1) there is a significant effect of the learning facility use at school on the learning achievement in Office Equipment subject matter of the students in Grade XI of the Office Administration Program of State Vocational High School 1 of Sukoharjo in Academic Year 2012/2013 as indicated by the value of tcount = 3.611 > that of ttable = 1.684 at the significance level of 5%; (2) there is a significant effect of the way of learning on the learning achievement in Office Equipment subject matter of the students in Grade XI of the Office Administration Program of State Vocational High School 1 of Sukoharjo in Academic Year 2012/2013 as shown by the value of tcount = 3.393 > that of ttable = 1.684 at the significance level of 5%; and (3) there is a simultaneously significant effect of the learning facility use at school and the way of learning on the learning achievement in Office Equipment subject matter of the students in Grade XI of the Office Administration Program of State Vocational High School 1 of Sukoharjo in Academic Year 2012/2013 as pointed out by as indicated by the value of Fcount = 11.186 > that of Ftable = 3.252 at the significance level of 5%. The multiple linear regression equation is Ŷ = 55.207 + 0.243 X1 + 0.161 X2. The simultaneous contribution of the independent variables to the dependent variable (R2) is 37.7%. The relative contribution of the learning facility use at school to the learning achievement is 53.34%, and that of the way of learning to the learning achievement is 46.66%. In addition, the effective contribution of the learning facility use at school to the learning achievement is 20.10%, and that of the way of learning to the learning achievement is 17.58% Keywords: The learning facility use, the way of learning, and learning achievemen

The Relationship Between Sexual Objectification, Body Image, Activity Monitoring, and Compulsive Exercise

The purpose of this study was to look at the relationship between sexual objectification, body image, eating disorder symptomatology, activity monitoring, and compulsive exercise. Objectification Theory provides a framework for understanding a woman’s experience of the culturally established ideal body, which in Western cultures has become increasingly thin. As women internalize the thin ideal, their experience of self-worth and body image can be impacted and can lead to efforts to control their appearance including diet and exercise. While exercise has been consistently shown to have health benefits, little has been said about unhealthy levels of exercise. Compulsive exercise in particular is concerning due to its correlation with eating disorders. Additionally, developments in self-monitoring tools, such as accelerometers, provide immediate feedback about exercise, which might lead to increases in compulsive exercise. Participants in this study were college women who were enrolled in a fitness class. They responded to measures of sexual objectification, body image, eating disorder symptoms, and compulsive exercise at the beginning and end of a required semester-long fitness class that involved self-monitoring and the use of fitness trackers. Results revealed that, of the variables measured, body shame was the only significant predictor of compulsive exercise. Analysis also indicated a relationship between sexual objectification and body image. The addition of body shame in the construct of compulsive exercise is significant because of the relationship between eating disorders and compulsive exercise. Sexual objectification can increase body shame, which in turn is a risk factor for the development of compulsive exercise, and compulsive exercise is a known precursor to the development of eating disorders. This information provides additional insight into the complex mechanism of compulsive exercise and can inform professionals working with young woman who could be at risk for developing more severe eating pathology. Key Words: Sexual Objectification, Accelerometer, Compulsive Exercise, Body Image, Eating Disorde

Mengoptimalkan Hasil Belajar Ilmu Pengetahuan Alam Melalui Inquiring Minds Want To Know Learning Pada Siswa Kelas V Semester Ganjil Di SD Negeri 5 Ampelgading, Kecamatan Tirtoyudo, Kabupaten Malang Tahun Pelajaran 2019/2020.

Pada kenyataannya sekarang ini tidak jarang siswa kurang berminat terhadap mata pelajaran Ilmu Pengetahuan Alam. Hal ini disebabkan kurangnya penguasaan siswa terhadap konsep yang diterima di sekolah. Siswa beranggapan bahwa Ilmu Pengetahuan Alam itu sulit karena dipenuhi oleh masalah yang harus diselesaikan dengan benar. Ada juga yang berpendapat bahwa mereka kadang sedang dan kadang juga tidak senang tergantung pada materi yang disampaikan, cara siswa menyampaikannya serta pendekatan yang digunakan. Di samping itu juga ada beberapa siswa yang berpendapat bahwa dengan menggunakan langkah-langkah pendekatan Inquiring Minds Want To Know Learning (Pembelaran yang Membangkitkan Minat Belajar Siswa) dalam menye­lesaikan soal-soal terlalu panjang sehingga siswa yang sudah memahami dan mampu menyelesaikan soal tersebut cepat bosan. Pada siklus II ini kemampuan siswa untuk memecahkan soal-soal latihan dengan menggunakan langkah-langkah Inquiring Minds Want To Know Learning  lebih baik, demikian pula keaktifan siswa dalam menyelesaikan soal-soal latihan semakin meningkat dengan indikasi sebagai berikut: (1). Hasil belajar siswa Kelas V Semester Ganjil Di SD Negeri 5 Ampelgading, Kecamatan Tirtoyudo, Kabupaten Malang Tahun Pelajaran 2019/2020. yang diajar dengan pendekatan Inquiring Minds Want To Know Learning pada siklus 1 dengan skor rata-rata penguasaan siswa adalah 67,77 (67,77%) dengan standar deviasi 13,91 berada pada kategori "sedang";(2). Hasil belajar Ilmu Pengetahuan Alam siswa Kelas V Semester Ganjil Di SD Negeri 5 Ampelgading, Kecamatan Tirtoyudo, Kabupaten Malang Tahun Pelajaran 2019/2020.  dalam siklus II dengan skor rata-rata 88,72 (88,72%) dengan dengan KKM yang ditentukan sebesar 75 (75%) berada pada kategori "tinggi". Jika sebelumnya materi yang kurang dimengerti siswa dijelaskan kembali, namun pada siklus II sebagian siswa sudah langsung mengerti dengan cepat. Rasa percaya diri siswa semakin meningkat ini terlihat dari setiap pertemuan, siswa mengerjakan soal dipapan tulis semakin meningkat. Maka dalam kegiatan penelitian ini dapat dinyatakan Tuntas dan Berhasil

Prarancangan Pabrik Furfural Dari Tongkol Jagung Dengan Proses Quaker OATS Kapasitas 5.000 Ton Per Tahun

Prarancangan pabrik Furfural dengan proses Quaker Oats ini dimaksudkan untuk memenuhi kebutuhan Furfural dalam negeri dan juga untuk diekspor. Dibuat dengan bahan baku tongkol jagung dan air direncanakan dengan kapasitas 5.000.000 kg/tahun dan beroperasi selama 330 hari/tahun. Proses pembuatan dilakukan di dalam reaktor alir tangki berpengaduk dengan cara hidrolisis dalam tangki hidrolisa pada fase padat-cair pada suhu 153 °C tekanan 1,5 atm kemudian mengalami proses netralisasi dan pemurnian sehingga diperoleh produk Furfural dengan kadar 99%. Kebutuhan bahan baku tongkol jagung sebesar 6821,67 kg/jam. Produk berupa Furfural sebanyak 631,31 kg/jam. Utilitas pendukung proses terdiri dari unit pengadaan air sebesar 48.438,72 kg/jam yang diperoleh dari air sungai, penyediaan saturated steam sebesar 6717,27 kg/jam yang diperoleh dari boiler dengan bahan bakar fuel oil sebesar 15002,36 liter/hari, kebutuhan udara tekan sebesar 46,53 m3/jam, unit pengadaan listrik diperoleh dari PLN dan generator set sebesar 150 kW sebagai cadangan bahan bakar sebanyak 1,07 m3/jam. Furfural yang dihasilkan dimasukkan dalam tangki penyimpan dalam fase cair dan siap dipasarkan. Pabrik ini direncanakan didirikan di Karanganyar, Surakarta dengan luas tanah 30.000 m2 dan jumlah karyawan 135orang. Pabrik Furfural ini direncanakan beroperasi selama 330 hari selama satu tahun dengan jumlah karyawan 135 orang, mempunyai modal tetap Rp. 74.094.283.624,58 dan modal kerja Rp 34.245.835.765,70. Dari analisa ekonomi terhadap pabrik ini didapatkan keuntungan sebelum pajak Rp. 13.871.427.053,42 per tahun dan keuntungan setelah pajak Rp. 6.935.713.526,71 per tahun. Percent Return On Investment (ROI) debelum pajak 18,72 % dan setelah pajak 9,36%. Pay Out Time (POT) sebelum pajak 3,48 tahun dan POT setelah pajak 5,17 tahun. Break Even Point (BEP) 52,42 % dan Shut Down Point (SDP) 27,01 %. Discounted Cash Flow (DCF) terhitung sebesar 17,98 %. Dari data analisis kelayakan diatas dapat disimpulkan bahwa pabrik Furfural layak untuk didirikan

Exploring Bs→Ds(∗)±K∓B_s \to D_s^{(*)\pm} K^\mp Decays in the Presence of a Sizable Width Difference ΔΓs\Delta\Gamma_s

The $B_s \to D_s^{(*)\pm} K^\mp$ decays allow a theoretically clean determination of $\phi_s+\gamma$, where $\phi_s$ is the $B^0_s$-$\bar B^0_s$ mixing phase and $\gamma$ the usual angle of the unitarity triangle. A sizable $B_s$ decay width difference $\Delta\Gamma_s$ was recently established, which leads to subtleties in analyses of the $B_s \to D_s^{(*)\pm} K^\mp$ branching ratios but also offers new "untagged" observables, which do not require a distinction between initially present $B^0_s$ or $\bar B^0_s$ mesons. We clarify these effects and address recent measurements of the ratio of the $B_s\to D_s^\pm K^\mp$, $B_s\to D_s^\pm\pi^\mp$ branching ratios. In anticipation of future LHCb analyses, we apply the SU(3) flavour symmetry of strong interactions to convert the $B$-factory data for $B_d\to D^{(*)\pm}\pi^\mp$, $B_d\to D_s^{\pm}\pi^\mp$ decays into predictions of the $B_s \to D_s^{(*)\pm} K^\mp$ observables, and discuss strategies for the extraction of $\phi_s+\gamma$, with a special focus on untagged observables and the resolution of discrete ambiguities. Using our theoretical predictions as a guideline, we make simulations to estimate experimental sensitivities, and extrapolate to the end of the planned LHCb upgrade. We find that the interplay between the untagged observables, which are accessible thanks to the sizable $\Delta\Gamma_s$, and the mixing-induced CP asymmetries, which require tagging, will play the key role for the experimental determination of $\phi_s+\gamma$.Comment: 21 pages, 7 figures, matches published versio

Leading and Navigating Chaotic Situation: How Leadership through Resiliency Play Role in The Process of Responding to Emerging New Situation Induced by Novel Coronavirus Outbreak.

The Novel Coronavirus outbreak causing a chaotic context. Characterize by VUCA, the prolonged and situation induced by the outbreak also challenge the leader's stamina, including the leader of PT. Olefin Mono(*). In this Chaotic, leaders face such an environment that needs a different set of capabilities. This chaos may help identify the action and leader quality when facing any upcoming challenges in the future. This research introduces the Cynefin-Framework as a sensemaking process to understand the context of the problems induced by the Novel Coronavirus Outbreak. The Conceptual framework adapts from the integrated model of resilience for employees by Britt, T. W., Shen, W., Sinclair, R. R., Grossman, M. R., & Klieger, D. M. (2016). The framework shows complementing aspects in a leader's resource capacity (1). Attributes (2). Leadership, actions performed by the person. The research found that profile of resilient leaders clustering into (a). Leader's Resilience Action (b). Leader's Resilient System Thinking (c). Leaders' Resilience Capacity Building Skill. The research also found that leadership styles and actions tend to change during chaos. Keywords: Novel Coronavirus, VUCA, Cynefin Framework, Chaotic context, Resiliency, Leadership, Resilient Leade